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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/gpu/drm/nouveau/nouveau_dp.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/gpu/drm/nouveau/nouveau_dp.c')
-rw-r--r--kernel/drivers/gpu/drm/nouveau/nouveau_dp.c89
1 files changed, 89 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/nouveau/nouveau_dp.c b/kernel/drivers/gpu/drm/nouveau/nouveau_dp.c
new file mode 100644
index 000000000..c3ef30b3a
--- /dev/null
+++ b/kernel/drivers/gpu/drm/nouveau/nouveau_dp.c
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2009 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ben Skeggs
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_dp_helper.h>
+
+#include "nouveau_drm.h"
+#include "nouveau_connector.h"
+#include "nouveau_encoder.h"
+#include "nouveau_crtc.h"
+
+static void
+nouveau_dp_probe_oui(struct drm_device *dev, struct nvkm_i2c_port *auxch,
+ u8 *dpcd)
+{
+ struct nouveau_drm *drm = nouveau_drm(dev);
+ u8 buf[3];
+
+ if (!(dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT))
+ return;
+
+ if (!nv_rdaux(auxch, DP_SINK_OUI, buf, 3))
+ NV_DEBUG(drm, "Sink OUI: %02hx%02hx%02hx\n",
+ buf[0], buf[1], buf[2]);
+
+ if (!nv_rdaux(auxch, DP_BRANCH_OUI, buf, 3))
+ NV_DEBUG(drm, "Branch OUI: %02hx%02hx%02hx\n",
+ buf[0], buf[1], buf[2]);
+
+}
+
+int
+nouveau_dp_detect(struct nouveau_encoder *nv_encoder)
+{
+ struct drm_device *dev = nv_encoder->base.base.dev;
+ struct nouveau_drm *drm = nouveau_drm(dev);
+ struct nvkm_i2c_port *auxch;
+ u8 *dpcd = nv_encoder->dp.dpcd;
+ int ret;
+
+ auxch = nv_encoder->i2c;
+ if (!auxch)
+ return -ENODEV;
+
+ ret = nv_rdaux(auxch, DP_DPCD_REV, dpcd, 8);
+ if (ret)
+ return ret;
+
+ nv_encoder->dp.link_bw = 27000 * dpcd[1];
+ nv_encoder->dp.link_nr = dpcd[2] & DP_MAX_LANE_COUNT_MASK;
+
+ NV_DEBUG(drm, "display: %dx%d dpcd 0x%02x\n",
+ nv_encoder->dp.link_nr, nv_encoder->dp.link_bw, dpcd[0]);
+ NV_DEBUG(drm, "encoder: %dx%d\n",
+ nv_encoder->dcb->dpconf.link_nr,
+ nv_encoder->dcb->dpconf.link_bw);
+
+ if (nv_encoder->dcb->dpconf.link_nr < nv_encoder->dp.link_nr)
+ nv_encoder->dp.link_nr = nv_encoder->dcb->dpconf.link_nr;
+ if (nv_encoder->dcb->dpconf.link_bw < nv_encoder->dp.link_bw)
+ nv_encoder->dp.link_bw = nv_encoder->dcb->dpconf.link_bw;
+
+ NV_DEBUG(drm, "maximum: %dx%d\n",
+ nv_encoder->dp.link_nr, nv_encoder->dp.link_bw);
+
+ nouveau_dp_probe_oui(dev, auxch, dpcd);
+ return 0;
+}